Tube frame



July 7, 1925. y

E. F.` HATHAWAY TUBE .FRAME Filed spt. 1. 1925 Patented July 7, 1925. Y

4Einsatz. r. HATHWAY, oFWELLEsLEY, MASSACHUSETTS, AssreNoR To SHAWMUT ENGINEERING COMPANY, OF BOSTON, MASSACHUSETTS,

MASSACHUSETTS.

A CORPORATION 0F TUBE FRAME.

Application led September To all whom. t may concern.:

Be it known that I, EDGAR F. I-IATHAWAY, a citizen of the United States, and resident of IVellesley, in the county of Norfolk and State of Massachusetts, have invented certain new and4 useful Improvements in Tube Frames, of which the following isa speci-A fication.

This invention relates to tube frames such as are commonly used in tuft -weaving for` the manufacture of. Axminster carpets or similar pile fabrics, and is intended to provide a construction of tube frame which shall possess a high degree of rigidity and firmness so as to avoid buckling of the` frame when theyarn tufts Vare presented to the `fabric being woven without unduly increas ing the weight of the tube frame construe tion. i

The improvement particularly relates to the construction of the carrier bar which forms the backboneof the whole tube frame and, generally speaking7 comprises a tubular or hollow bar through whose middle portion is extended longitudinal reenforcing means formed in a transversely bowed or arch construction soas to engage the inter? nal faces of opposite'walls of the carrier bar and support transverse stresses to which the bar is subjected when in use. Theseand other features of the invention willbe par-' ticularly explained in the following speci- `i'ication and will be `defined in the claims hereto annexed. Y y

In `the accompanying drawings I have illustrated several forms of construction embodying the principles of thepre'sent invention, in which: n K

Figure l is a front elevation illustrating a completetube frame with the middle portion of the carrier bar cut away to expose the interior reenforcing means.

Figure 2 is a transverse section of the same on an enlarged scale. Y

Figure 3 is a transverse ysection showing a modified construction @of reenforcing means.

Figures 4 and 5 are transverse sections showing other modifications of stiifening and reenforcing construction. y

In the practice of this invention, according to the illustration in Figures l and 2 of the drawings, the tube frame comprises a hollow carrier bar l,v of substantially rec- 1, 1923. Serial No. 660,528,-

tangular cross section provided with suspension hangers 2, of any suitable type at its opposite ends for frame from a suitable! carrier chain or conveyor, and aifording also bearings for the eXtreme end journals of the yarncarrier spool 3.

On the front face of the carrier baris secured a U-shaped attaching strip or channel bar through whose'parallel wings the individual tuft tubes Llare inserted, accordinglto present vknown practice. The U- shaped tube-attaching bar is firmly but detachably secured against the front face vof the carrier barby means of transverse bolts 8, engaged with tapered fastening, nuts 9, which are yprovided with` thin `flanges 10, to prevent their passing through the openings provided at intervals for the insertion of the nuts to engage the ends ofthe transverse bolts. i

The reenforcing member shown in Figures l and 2 comprises a transverse arch member inthe form of a cylindrical tube 6, bowed or bent out. of a flat strip of metal Vwith their parallel longitudinal edges Yvery slightlyV spaced apart so as to permit a slight compression when theV reenforcing member is inserted insidey the carrierbarso as to establish firm'contact oriengagement with the o-pposite walls.4 of ,the carrier. bar.

The bolts 7 which are used to secure the feet ofV the intermediate spool brackets 3*, firmly to the top face of the carrier bar may be passed directlyy through this tubular re-` enforcing member. as shown in Figure 2 so that they do not interfere with the proper bearing or engagement of Vthe reenforcing member with the interior faces of the walls of the carrier bar.

As shown in Figure `3,7'however, these spool brackets 3Z1 may be secured to the up* per wall of the tubular carrier bar 3b, and approximately semi-cylindrical reenforcingmembers l1 maybe employed to stiifen the carrier bar. Inthis case, the' reenforcing members l1, are so proportioned that their suspending the tubel intermediate portions engage back to back Y tudinal `edges engaging the-opposite Walls of the carrier bar at their corners so asto re-V ent'orce in all directions. Y Still` another modiiied formA is shown in Figures -ivhieh is similar in. principle to' that shown in Figure 3, only in this case the bearing-like reen'forcing members IQ, are

` enforcing members Aare concerned, whether,

at their points oi' contact with each other, the'membei's areA spot-Welded together f or simplyl Jforminechanical engagement or contact with each other.

In Figure 5 Ihaveshoivn thetrough-like or transverselybowed reenforc'in'g member in the formof af-V-sliaped trough 13, having afilanged extension 11i on one side through which are passed 4the tube-attaching bolts 8.

By reason ofthe troughiike or transversely` arched shape AVgiven to leach 'form ot reenforcing'members, they-may be made of comparatively light or thin stock so yas not to add materially to the'riveightfof the "tube iframe particularly as they need not be carried through the 4entire length ot the carrier bar but/Will suffice to perform Atheir .func- 'tion Lif extended i through the middle portion or' 'the'leiigth of the carrierbar as shown. Inasmu'eh 'as thetransverse bolts, either for attaching the spool-bearing brackets or the tutt tube-attaching member, may pass div` rectly throughthereentorcing it Will be seen that longitudinal displacementl of-theshorter reentoi'cing member is 'positively prevented.

`h'at I claim is: l y A`1."In a ytube fram-eier*supporting Ethe yarn spool andv a series of tufttubes in cooperative relation, the combination y'of a longitudinaltnbular carrier bar and transversely 4arched reenforcing 'means 'disposed interiorly thereof tol `extend through Athe middle portion having internal bracing engagement therewith, substantially asdescribed;

2.4In a tube frame for supporting'the yarn spool and aserieslof tutt tubes incooperative relation, the Acombination of a tubular carrier bar of polygonal cross Yseetion and interior reenforcmg4 means extendoi' the length of th-e bar and ing vvlongitudinally through the -middle p0rtion Tof the bar, said reenforcing means being transversely bowed to form transversely arched means engaging the opposite interior Walls `ofthe carrierfbar' in position to lresist transverse stresses 'on' said bar, substantially asfdecribed.

3. In a tube frame for supporting the yarnspo'olandafawseries of tutt tubes in cooperative relation, the combination of a longitudinal tubular f carrier bar,- of plural reenforcing -ineinbers, each being transversely arched and arranged with the lateral edges 'of' heirl respectivexarches 'forming the supporti-ng 1contact With 'opposite Walls ot the bar,- said re'en'f'orcing ,meansV having their intermediate 'portions arranged back to back to reenforce eachother against transverse strains, substantially asdescrifbed.

4. In-a tube r'ameftor supporting ,the yarn' spool andaiseries of tutt tubes in cooperative?lrelation, the combination With a Vltmgitudinaltubular-carrier bar of approximately rectangular cr0ss7-seetion,and interior reenforcing-'means 'extending longitudinally through fthe middle portion oi" the baiand arranged-tohaveisupporting engagement Witlithe top and "bottom and lside Walls of said bar, substantially as described.

f 5.In f a ftube' lframe for "supporting lthe yarn speol 'and aseries oi -tuft tubes in cooperative relation,` fthe combination 'of .ai hollo'ivlongitudinal carrier y bar, tutt tube-attaching bolts'passed at intervalstransversely throu'gh said1 bar,- and' longitudinal'reenforcing means extending through the middle portionlotsaid bar and arranged to 'form supporting' engagement 'withl opposite Walls of saidi bar, `'said reenforeing means being penetrated by said fastening bolts, substantially as described.

"6.1'1Ina' tube frame for lsupporting the yarn Yspool and aseries of--tuittubes in cooperative relation, the combination of a 'longitudinal' tubular carrier bar, interior trough-like re'entorcing means -engage opposite lWalls of; said-bar and suparranged to port them against tiansversefstrains, said "reeiiforcing' "means-y 'extending' 'through the middle portion of sai'dlbarfand meansr 'for preventing the longitudinal displacen'ient of said supporting described. Y In Witness whereof, I-h'ave subscribedthe abovelspeeiication.

"means, substantially as 

